[opt](nerieds) PhysicalOlapScan and PhysicalFileScan should print its id in plan

[englefly]

What problem does this PR solve?

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[englefly]

run buildall

[Thearas]

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1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
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[hello-stephen]

FE UT Coverage Report

Increment line coverage 100.00% (4/4) 🎉
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[hello-stephen]

FE Regression Coverage Report

Increment line coverage 50.00% (2/4) 🎉
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[englefly]

/review

[englefly]

/build.sh

[englefly]

run buildall

[github-actions]

Summary

Requesting changes for one blocking regression and one missed parallel path.

1. regression-test/suites/query_p0/stats/partitionRowCount.groovy now hardcodes a statement-local AbstractPlan.id (19). That id comes from StatementContext.getNextObjectId() / StatementScopeIdGenerator.newObjectId(), so unrelated optimizer rewrites can renumber the scan and break the case without any semantic plan change.
2. PhysicalHudiScan still overrides toString() and is created via LogicalHudiScanToPhysicalHudiScan, so the Hudi file-scan path still does not print an id.

Critical Checkpoints

• Goal of task: Partially achieved. PhysicalOlapScan and base PhysicalFileScan now print AbstractPlan.id, but PhysicalHudiScan does not. The added regression does not prove the behavior robustly because it hardcodes a statement-local id.
• Small and focused: Yes.
• Concurrency: Not applicable; these changes only affect explain-string formatting.
• Lifecycle/static init: Not applicable.
• Config changes: None.
• Compatibility: User-visible physical-plan explain text changes; acceptable if intentional, but tests must avoid brittle ids.
• Parallel code paths: Not fully covered; PhysicalHudiScan remains on the old format.
• Special conditions/comments: None.
• Test coverage: Insufficient. The only updated regression is brittle, and there is no coverage for the Hudi path.
• Test result changes: The modified expectation is not stable.
• Observability: Table name is still present in the payload, so explain readability is mostly preserved.
• Transaction/persistence/data writes/FE-BE variable passing: Not applicable.
• Performance: No meaningful impact.
• Other issues: None beyond the above.

[hello-stephen]

FE Regression Coverage Report

Increment line coverage 0.30% (2/664) 🎉
Increment coverage report
Complete coverage report

[englefly]

run buildall

[englefly]

run buildall

[hello-stephen]

FE Regression Coverage Report

Increment line coverage 40.00% (2/5) 🎉
Increment coverage report
Complete coverage report

resolved